航空券

1. Origins, structure, and basic meaning

• Structure: 航空券, read こうくうけん, is an airline ticket recording the purchase or reservation of air travel.
• Basic usage: A traveler may book a round trip once dates are fixed or recheck the flight time before leaving for the airport.

2. Common pitfalls and similar expressions

• A ticket booking air travel
  • This is the airline ticket used to book a round trip or check departure time before going to the airport. Its role differs from the boarding pass presented during boarding.